<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>06-简写属性-padding</title>
    <style>
        span {
            display: inline-block;
            background-color: #f00;

            /*padding: 20px 20px 40px 20px;*/
            padding: 20px;
            padding-bottom: 40px;
        }
    </style>
</head>
<body>

<span>span</span>

</body>
</html>